Have you ever wondered why this superstition still persists? Well, here's some clarification.

First up, there’s a Norse legend that has 12 gods sitting down to a banquet when the uninvited Loki shows up, making it a party of 13. He killed one of the gods, resulting in Ragnarok— the death of several gods, natural disasters, basically the biggest catastrophe on earth that left only two human survivors.

Christians also believe that Jesus was crucified on a Friday. Researchers think that the date could possible be something like April 3rd, 33 AD, but the 13th still shows up again, because many Christians believe that the whole Cain and Abel debacle happened on that date.

An old superstition says that if you have 13 letters in your name, you’ve got the devil’s luck. It may sound stupid, but Charles Manson, Jack the Ripper, Jeffrey Dammer, Theodore Bundy and Albert De Salvo all have 13 letters. Disregard middle names.

The Thirteen Club was a group in the late 1800s that really wanted to debunk the legend that 13 people at a table would always result in the death of one of them the next year. They would meet on the 13th of the month and have a 13-person dinner. To make things even more interesting they would spill salt on the table— and NOT throw it over their shoulders (shocking).

They fined members 13 cents for showing up late. 5 presidents were members of this strange club: Benjamin Harrison, Grover Cleveland, William McKinley, Theodore Roosevelt and Chester A. Arthur.

On Friday, October 13th, 1972, Uruguyan Air Force Flight 571 crashed in the Andes, killing 29 people. That exact same day, 174 people were killed when a Soviet Aeroflot crashed in a lake about half a mile from the runway.